Do not truncate the gradient out-of-place

x/|x| is only a problem if x == 0 just divide by |x|, no matter what non-zero value it is

Do not truncate the gradient out-of-place
4a6bfd46 · Elias Pipping · Elias Pipping · ab4aec9e · 4a6bfd46
Commit 4a6bfd46 authored 13 years ago by Elias Pipping Committed by Elias Pipping 13 years ago
--- a/dune/tectonic/localnonlinearity.hh
+++ b/dune/tectonic/localnonlinearity.hh
@@ -89,7 +89,7 @@ template <int dimension> class LocalNonlinearity {
  void addGradient(VectorType const &x, VectorType &y) const {
    double const xnorm = x.two_norm();
-    if (xnorm < 1e-8 or std::isinf(func_->regularity(xnorm))) // TODO
+    if (xnorm == 0 or std::isinf(func_->regularity(xnorm)))
      return;
    // left and right differential coincide in this case